阅读说明：本技术 一种卷烟、降温增香微胶囊及其制备方法和应用 (Cigarette, cooling and aroma-enhancing microcapsule and preparation method and application thereof ) 是由 韩路 田海英 楚文娟 万纪强 高明奇 赵志伟 胡少东 付瑜锋 于 2021-09-20 设计创作，主要内容包括：本发明公开了一种卷烟、降温增香微胶囊及其制备方法和应用,降温增香微胶囊包括壁材和内容物,壁材包括聚碳酸亚丙酯和聚碳酸丁酯,且聚碳酸丁酯的质量为聚碳酸亚丙酯的质量的30％-50％,内容物为烟碱、烟用香精料和天然提取物中的至少一种,且内容物与壁材的质量比为1:(2-4)。降温增香微胶囊通过施加于滤棒中制备复合滤棒,取代现有技术中的聚乳酸薄膜降温单元而用于加热不燃烧卷烟中,使得加工工艺更为简便化、高效化。(The invention discloses a cigarette, a cooling and aroma-improving microcapsule and a preparation method and application thereof, wherein the cooling and aroma-improving microcapsule comprises a wall material and contents, the wall material comprises polypropylene carbonate and polybutylene carbonate, the mass of the polybutylene carbonate is 30-50% of that of the polypropylene carbonate, the contents are at least one of nicotine, tobacco essence and natural extracts, and the mass ratio of the contents to the wall material is 1 (2-4). The temperature-reducing and aroma-enhancing microcapsule is applied to the filter stick to prepare the composite filter stick, and is used for heating non-combustible cigarettes instead of a polylactic acid film temperature-reducing unit in the prior art, so that the processing technology is simpler and more efficient.)

1. The microcapsule is characterized by comprising a wall material and contents, wherein the wall material comprises polypropylene carbonate and polybutyl carbonate, the mass of the polybutyl carbonate is 30% -50% of that of the polypropylene carbonate, the contents are at least one of nicotine, tobacco essence and natural extracts, and the mass ratio of the contents to the wall material is 1 (2-4).

2. A preparation method of cooling and aroma-enhancing microcapsules is characterized by comprising the following steps:

step (1): dissolving wall material raw materials in dichloromethane to obtain a precursor solution, wherein the wall material raw materials comprise polypropylene carbonate and polybutyl carbonate, the mass of the polybutyl carbonate is 30% -50% of that of the polypropylene carbonate, and the mass ratio of the wall material raw materials to the dioxymethane is 1 (20-30);

step (2): adding the content into the precursor solution, and uniformly stirring to obtain a first solution, wherein the mass ratio of the content to the wall material raw material is 1 (2-4), and the content is at least one of nicotine, tobacco essence and natural extract;

and (3): mixing polyvinyl alcohol, Span 80 and water to obtain a second solution, wherein the mass concentration of the polyvinyl alcohol in the second solution is 1.5% -3%, and the mass concentration of the Span 80 is 0.2% -0.6%;

and (4): adding the first solution into the second solution which is stirred at a high speed according to the volume ratio of the first solution to the second solution being 1 (10-15) to obtain a mixed solution;

and (5): and continuously stirring the mixed solution under the vacuum-pumping condition, centrifuging, washing and drying the product to obtain the cooling and aroma-enhancing microcapsule.

3. The preparation method of the cooling and flavoring microcapsule according to claim 2, wherein the mass ratio of the wall material raw material to the dioxymethane in the step (1) is 1: 25.

4. The method for preparing temperature-reducing and flavor-enhancing microcapsules according to claim 2, wherein the mass concentration of the polyvinyl alcohol in the second solution in the step (3) is 2%.

5. The method for preparing temperature-reducing and flavor-enhancing microcapsules according to claim 2, wherein the concentration by mass of Span 80 in the second solution in the step (3) is 0.5%.

6. The preparation method of temperature-reducing and flavor-enhancing microcapsules according to claim 2, wherein the volume ratio of the first solution to the second solution in the step (4) is 1: 10.

7. The process for preparing temperature-reducing and flavor-enhancing microcapsules according to claim 2, wherein a Soxhlet reactor is used in the step (4) and the step (5).

8. The process for preparing temperature-reducing and flavor-enhancing microcapsules according to claim 2, wherein the time in the step (5) is 3-5 h.

9. The application of the cooling and flavoring microcapsules of claim 1 in heating non-burning cigarettes is characterized in that the cooling and flavoring microcapsules are added into a filter stick of a heating non-burning cigarette in an adding amount of 50-80 mg/cigarette.

10. A cigarette which is not combusted by heating is characterized by comprising a filter tip section, a cooling section, a blank pipe section and a tobacco section which are sequentially arranged, wherein the cooling section is internally provided with the cooling and aroma-enhancing microcapsule according to claim 1.

Technical Field

The invention relates to the field of cigarette manufacturing, in particular to a cigarette, a cooling and aroma-enhancing microcapsule and a preparation method and application thereof.

Background

The existing cigarette which is heated and not combusted generally has the problem of higher smoke temperature. Moreover, limited by heating temperature, the tobacco material is not cracked sufficiently, the release of the cigarette which is not combusted by heating is only about 5 percent of that of the traditional tobacco, so the problems of insufficient smoke quantity, low aroma quantity and the like exist in the cigarette which is not combusted by heating.

In recent years, the development of slow-release cooling materials becomes a research hotspot in the field of novel heating non-burning cigarettes. Most of the commercial products of heating non-combustion cigarettes adopt multi-section cigarette design to treat the smoke generated by the cigarette core section. The multi-section cigarette cooling unit is formed by gathering embossed polylactic acid films, and when high-temperature smoke flows through the cooling section, polylactic acid absorbs heat and changes phase, so that the smoke temperature is reduced. However, the polylactic acid film has a limited cooling range, and is not easy to realize the functions of increasing aroma and supplementing aroma.

Adding particle materials with special fragrance into a cigarette which is not combusted by heating, and simultaneously realizing the functions of cooling and increasing the fragrance of smoke is a technique which is concerned at present. In the existing particle materials, inorganic porous materials are mostly adopted, or gelatin, chitosan, sodium alginate and the like are taken as wall materials to obtain the perfume microcapsule, and phase-change materials such as polylactic acid and the like are required to be matched for realizing the functions of cooling and increasing fragrance.

Therefore, how to provide a microcapsule which can realize biodegradation, realize smoke cooling and supplement cigarette fragrance and improve the sensory quality of a heating non-combustion cigarette product becomes a technical problem which needs to be solved urgently in the field.

Disclosure of Invention

The invention aims to provide a novel technical scheme of a cooling and aroma-enhancing microcapsule which can realize biodegradation, realize smoke cooling and supplement cigarette aroma and improve the sensory quality of a heating non-combustible cigarette product.

According to a first aspect of the invention, a temperature-reducing and aroma-enhancing microcapsule is provided.

The microcapsule comprises a wall material and a content, wherein the wall material comprises polypropylene carbonate and polybutyl carbonate, the mass of the polybutyl carbonate is 30% -50% of that of the polypropylene carbonate, the content is at least one of nicotine, tobacco essence and natural extracts, and the mass ratio of the content to the wall material is 1 (2-4).

According to a second aspect of the invention, a preparation method of the cooling and flavoring microcapsule is provided.

The preparation method of the cooling and aroma-enhancing microcapsule comprises the following steps:

step (1): dissolving wall material raw materials in dichloromethane to obtain a precursor solution, wherein the wall material raw materials comprise polypropylene carbonate and polybutyl carbonate, the mass of the polybutyl carbonate is 30% -50% of that of the polypropylene carbonate, and the mass ratio of the wall material raw materials to the dioxymethane is 1 (20-30);

step (2): adding the content into the precursor solution, and uniformly stirring to obtain a first solution, wherein the mass ratio of the content to the wall material raw material is 1 (2-4), and the content is at least one of nicotine, tobacco essence and natural extract;

and (3): mixing polyvinyl alcohol, Span 80 and water to obtain a second solution, wherein the mass concentration of the polyvinyl alcohol in the second solution is 1.5% -3%, and the mass concentration of the Span 80 is 0.2% -0.6%;

and (4): adding the first solution into the second solution which is stirred at a high speed according to the volume ratio of the first solution to the second solution being 1 (10-15) to obtain a mixed solution;

and (5): and continuously stirring the mixed solution under the vacuum-pumping condition, centrifuging, washing and drying the product to obtain the cooling and aroma-enhancing microcapsule.

Optionally, the mass ratio of the wall material raw material to the dioxymethane in the step (1) is 1: 25.

Optionally, the mass concentration of the polyvinyl alcohol in the second solution in the step (3) is 2%.

Optionally, the mass concentration of Span 80 in the second solution in the step (3) is 0.5%.

Optionally, the volume ratio of the first solution to the second solution in the step (4) is 1: 10.

Optionally, a soxhlet reactor is used in the step (4) and the step (5).

Optionally, the time in the step (5) is 3-5 h.

According to a third aspect of the invention, the application of the temperature-reducing and aroma-improving microcapsule disclosed by the invention in heating of a non-combustible cigarette is provided, wherein the temperature-reducing and aroma-improving microcapsule is added into a filter stick for heating of the non-combustible cigarette in an addition amount of 50-80 mg/cigarette.

According to a fourth aspect of the present invention there is provided a heated non-burning cigarette.

The cigarette comprises a filter tip section, a cooling section, a blank pipe section and a tobacco section which are sequentially arranged, wherein the cooling section is internally provided with the cooling and aroma-enhancing microcapsule disclosed by the invention.

The cooling and aroma-enhancing microcapsule disclosed by the invention has the following advantages:

(1) the microcapsule for cooling and increasing aroma adopts biodegradable high polymer material polypropylene carbonate/polybutyl carbonate composite polymer as wall material, and can effectively encapsulate functional additives such as essence and spice for cigarettes, natural extracts and the like. Meanwhile, the polycarbonate is a non-toxic high polymer material with biocompatibility, can be completely biodegraded due to the existence of ester groups in a molecular chain, and is environment-friendly and pollution-free.

(2) The polypropylene carbonate/polybutylene carbonate blend is an incompatible system, when the polybutylene carbonate starts to melt in an endothermic way at the temperature of more than 60 ℃, the capsule wall of the microcapsule is locally broken and collapsed, thereby releasing the capsule contents to enrich the fragrance of cigarettes and reducing the smoke temperature.

(3) The temperature-reducing and aroma-enhancing microcapsule is applied to the filter stick to prepare the composite filter stick, and is used for heating non-combustible cigarettes instead of a polylactic acid film temperature-reducing unit in the prior art, so that the processing technology is simpler and more efficient.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a scanning electron microscope photograph of the cooling and flavoring microcapsule of the present disclosure.

Fig. 2 is a particle size distribution diagram of the temperature-reducing and aroma-enhancing microcapsule of the present disclosure.

Figure 3 is a schematic structural view of an embodiment of the heated non-burning cigarette of the present disclosure.

The figures are labeled as follows:

a filter section-1, a cooling section-2, a hollow pipe section-3 and a tobacco section-4.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The temperature-reducing and aroma-improving microcapsule provided by the disclosure comprises a wall material and a content, wherein the wall material comprises polypropylene carbonate (PPC) and polybutylene carbonate (PBC), the mass of the polybutylene carbonate is 30% -50% of that of the polypropylene carbonate, the content is at least one of nicotine, tobacco essence and natural extracts, and the mass ratio of the content to the wall material is 1 (2-4).

The preparation method of the cooling and aroma-enhancing microcapsule provided by the disclosure comprises the following steps:

step (1): dissolving wall material raw materials in dichloromethane to obtain a precursor solution, wherein the wall material raw materials comprise wall materials including polypropylene carbonate and polybutyl carbonate, the mass of the polybutyl carbonate is 30% -50% of that of the polypropylene carbonate, and the mass ratio of the wall material raw materials to the dioxymethane is 1 (20-30).

The mass ratio of the wall material raw material to the dioxymethane in the step (1) may be 1: 25.

Step (2): and (2) adding the content into the precursor solution, and uniformly stirring to obtain a first solution, wherein the mass ratio of the content to the wall material raw material is 1 (2-4), and the content is at least one of nicotine, tobacco essence and natural extract.

And (3): and mixing polyvinyl alcohol, Span 80 and water to obtain a second solution, wherein the mass concentration of the polyvinyl alcohol in the second solution is 1.5-3%, and the mass concentration of the Span 80 is 0.2-0.6%.

The mass concentration of the polyvinyl alcohol in the second solution in the step (3) may be 2%.

The mass concentration of Span 80 in the second solution in step (3) may be 0.5%.

And (4): and (3) adding the first solution into the second solution which is stirred at a high speed according to the volume ratio of the first solution to the second solution of 1 (10-15) to obtain a mixed solution. The high speed stirring rate may be, for example, 600 and 1000 rpm.

The volume ratio of the first solution to the second solution in the step (4) is 1: 10.

And (5): and continuously stirring the mixed solution under the vacuum-pumping condition, centrifuging, washing and drying the product to obtain the cooling and aroma-enhancing microcapsule.

Soxhlet reactors can be used in step (4) and step (5).

The time in step (5) may be 3-5 h.

The application of the cooling and aroma-enhancing microcapsule in heating non-burning cigarettes provided by the disclosure is specifically as follows: the temperature-reducing and aroma-enhancing microcapsules are added into a filter stick for heating non-combustible cigarettes in an adding amount of 50-80 mg/cigarette.

As shown in fig. 3, the heated non-burning cigarette provided by the present disclosure includes a filter section 1, a cooling section 2, an empty tube section 3 and a tobacco section 4, which are arranged in sequence. The cooling section 2 is internally provided with the cooling and aroma-enhancing microcapsule of the present disclosure.

In specific implementation, the content of the cooling and aroma-enhancing microcapsules in the cooling section 2 is 50-80 mg.

The experimental procedures used in the examples below are conventional unless otherwise specified, the materials and reagents used therein are commercially available, and the equipment used in the experiments are well known to those skilled in the art without otherwise specified.

Example 1

2g of PPC and 0.6g of PBC were dissolved in 50mL of dichloromethane, followed by addition of 1g of sweet orange oil and stirring to homogeneity to give a first solution. 2 wt% polyvinyl alcohol and 0.5 wt% Span 80 in water (500mL) were added to the Soxhlet reactor, followed by the addition of the first solution and the reaction was stirred at 800rpm under 20kPa for 3 h. And after the reaction is finished, centrifugally collecting the solid product, washing with water, and drying to obtain the sweet orange oil microcapsule.

Adding sweet orange oil microcapsules into the filter stick, and then compositely rolling to obtain a four-section cigarette finished product (shown in figure 3), wherein the sweet orange oil microcapsules of 60mg are added into the cigarette filter stick.

Example 2

2g PPC and 0.8g PBC were dissolved in 50mL dichloromethane, followed by the addition of 0.8g apple essence and stirring well to give a first solution. 2 wt% polyvinyl alcohol and 0.5 wt% Span 80 in water (500mL) were added to the Soxhlet reactor, followed by the addition of the first solution and the reaction was stirred at 800rpm under 20kPa for 3 h. And after the reaction is finished, centrifugally collecting the solid product, washing with water, and drying to obtain the apple essence microcapsule.

Adding the apple essence microcapsules into the filter stick, and then compositely rolling to obtain a four-section cigarette finished product (shown in figure 3), wherein 60mg of apple essence microcapsules are added into the cigarette filter stick.

Example 3

2g of PPC and 0.8g of PBC were dissolved in 50mL of dichloromethane, followed by addition of 0.8g of strawberry essence and stirring to homogeneity to give a first solution. 2 wt% polyvinyl alcohol and 0.5 wt% Span 80 in water (500mL) were added to the Soxhlet reactor, followed by the addition of the first solution and the reaction was stirred at 800rpm under 20kPa for 3 h. And after the reaction is finished, centrifugally collecting the solid product, washing with water, and drying to obtain the strawberry essence microcapsule.

The strawberry essence microcapsules are added into the filter stick, and then the filter stick is compositely rolled to obtain a four-section cigarette finished product (shown in figure 3), wherein 60mg of the strawberry essence microcapsules are added into the cigarette filter stick.

The smoke temperature at the outlet end of the cigarette filter prepared in examples 1-3 was measured using a thermocouple temperature measuring device built into a heated cigarette smoking machine in a standard smoking mode, and the results are shown in table 1. Meanwhile, the fragrance, coordination, offensive odor, irritation, aftertaste and smoke amount of the cigarettes prepared in examples 1 to 3 were evaluated with reference to YC/T138 sensory evaluation method, and the results are shown in table 2. The control sample was a prior art cigarette.

TABLE 1 flue gas temperature test results

TABLE 2 sensory evaluation results

As can be seen from tables 1 and 2, the temperature-reducing and aroma-increasing microcapsules disclosed by the invention are added into the filter stick, so that the smoke temperature can be effectively reduced, the aroma amount can be increased, and the smoking quality of the cigarette can be improved.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.